How to choose degreasing agent for cleaning before packaging steel strip galvanizing?

How to choose degreasing agent for cleaning before packaging steel strip galvanizing?
　　The cheapest and effective degreasing agent is sodium hydroxide. In order to reduce the corrosion effect of sodium hydroxide on the steel strip, part of the trisodium phosphate can be used in conjunction. Alkaline degreasing agents containing surfactants are more effective than using alkaline degreasing agents alone and are more expensive.
　　Commercial degreasing agents produced by professional chemical companies are generally used. Different companies produce different surfactants and alkaline substances, and their effects are slightly different. Some companies also formulate their own degreasing and cutting, the effect is close to that of commercial degreasing agents, which has certain benefits in reducing costs.
　　 It must be noted that the electrolytic degreasing agent generally uses alkaline substances with better hydrolysis effect, without adding surfactants, because if surfactants are used, it is easy to produce foam, so that the hydrogen and oxygen bubbles generated by the electrolytic person cannot Immediately burst and form accumulation, there is a danger of explosion.